Alloy elbows can be made in several ways

Alloy elbows can be made in several ways

The hot push forming process of alloy elbow is a process of using commonly used elbow pushing machine, core die and heating device to make the blank on the die move forward under the push of the pushing machine, in which it is heated, expanded and bent to form. Hot push bend deformation characteristics are based on volume before and after plastic deformation rule of metal materials determine the pipe diameter, pipe diameter bend diameter, through the core module and control the deformation of the process, make the inner arc compressed metal flow, the compensation to other parts of the thinned by hole diameter, wall thickness uniform Angle is obtained.

The forming process of hot push elbow has the characteristics of beautiful appearance, uniform wall thickness and continuous operation, suitable for mass production, so it has become the main forming method of carbon steel and alloy steel elbow, and is also used in the forming of some specifications of stainless steel elbow.

The heating method of forming process has medium frequency or high frequency induction heating (heating ring can be multiple or single ring), flame heating and reflector furnace heating, which heating method depends on the requirements of forming products and energy conditions.

Stamping forming of alloy elbow:

Stamping forming elbow is the earliest forming process applied in the mass production of seamless elbow. In the production of elbow in common specifications, it has been replaced by hot push method or other forming process, but in some specifications of elbow due to the production of less quantity, wall thickness is too thick or too thin.

The product is still in use when there are special requirements. The forming of elbow is made of pipe blank equal to the outside diameter of the elbow, which is directly pressed by press in the die.

Before stamping, the tube blank is placed on the lower die, the inner core and end die are loaded into the tube blank, and the upper die begins to press down, and the elbow is formed through the constraint of the outer die and the support of the inner die.

Compared with the hot push process, the appearance quality of stamping is not as good as the former. The outer arc of the punching elbow is in the stretching state when forming, and there is no excess metal in other parts to compensate, so the wall thickness of the outer arc is reduced by about 10%. However, due to its applicability to single production and low cost, the stamping elbow process is mostly used in the manufacture of small batch, thick wall elbow.

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